ADN-458 Sister let strangers into the house and the ending

Aina took care of a man squatting near her house who had sunstroke. The man's name was Kamiya, and upon learning that Aina was a welfare office employee, he confessed that he was unemployed and asked for help. Aina, who had always cared for her, couldn't bear to leave her alone and asked for advice, but Kamiya, who had misunderstood the kindness he had been touched by for a long time as kindness to himself, suddenly developed a desire for Aina...